Home / 208,021.20-312,031.80-199,273.20

Finding the Fourth Proportional to 208,021.20, 312,031.80 and 199,273.20

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Solution

The fourth proportional to 208,021.20, 312,031.80 and 199,273.20 is: 298,909.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,021.20 : 312,031.80 = 199,273.20 : x
  2. Step 2: Convert to fraction form
    208,021.20/312,031.80 = 199,273.20/x
  3. Step 3: Cross multiply
    208,021.20x = 312,031.80 × 199,273.20
  4. Step 4: Simplify right side
    208,021.20x = 62,179,575,287.76
  5. Step 5: Solve for x
    x = 62,179,575,287.76/208,021.20
  6. Step 6: Final answer
    x = 298,909.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.